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Property, Plant and Equipment (Detail) - USD ($)
$ in Millions
Mar. 31, 2016
Dec. 31, 2015
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, gross $ 15,028 $ 14,554
Accumulated depreciation (6,494) (6,192)
Property, plant and equipment, net 8,534 8,362
Land and Land Improvements    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, gross 508 495
Buildings and Building Improvements    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, gross 2,857 2,753
Machinery and Equipment    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, gross 10,382 10,044
Construction in Progress    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, gross $ 1,281 $ 1,262